论文标题
简报：基于公共区块链的隐私保存供应链系统的设计和评估
Short Paper: Design and Evaluation of Privacy-preserved Supply Chain System based on Public Blockchain
论文作者
论文摘要
确保产品在供应链中的可追溯性是一个紧迫的问题。最近，已经提出了使用公共区块链（PBC）的供应链系统。在这些系统中，PBC用作供应链方之间共享的共同数据库，以确保分配信息（例如所有权传输记录）的完整性和可靠性。因此，这些系统在供应链中确保了高水平的可追溯性。但是，可以公开的分发信息可以是私人信息，因为任何人都可以阅读PBC中记录的信息。在本文中，我们提出了一种保留隐私的方法，同时使用PBC在供应链系统中确保可追溯性。提出的方法通过加密隐藏分配信息来保留隐私。此外，提出的方法可确保合法供应链方之间的分配，同时通过使用零知识证明来证明其真实性，从而掩盖其区块链地址。我们实施有关以太坊智能合约的建议方法，并根据交易费用评估成本绩效。结果表明，每方的费用最多为2.6美元。
Securing the traceability of products in the supply chain is an urgent issue. Recently, supply chain systems that use public blockchain (PBC) have been proposed. In these systems, PBC is used as a common database shared between supply chain parties to secure the integrity and reliability of distribution information such as ownership transfer records. Thus, these systems secure a high level of traceability in the supply chain. However, the distribution information, which can be private information, is made public since the information recorded in PBC can be read by anyone. In this paper, we propose a method for preserving privacy while securing traceability in a supply chain system using PBC. The proposed method preserves privacy by concealing the distribution information via encryption. In addition, the proposed method ensures distribution among legitimate supply chain parties while concealing their blockchain address by using a zero-knowledge proof to prove their authenticity. We implement the proposed method on Ethereum smart contracts and evaluate cost performance based on transaction fees. The results show that the fee per party is at most 2.6 USD.
